期刊
JOURNAL OF SEPARATION SCIENCE
卷 40, 期 14, 页码 2925-2932出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.201700073
关键词
amino acids; beef jerky; heterocyclic aromatic amines; on-line solid-phase extraction; reduced graphene oxide
资金
- Natural Science Foundation of Fujian Province [2015J01058]
- NFFTBS [J1310024]
An arginine-modified reduced graphene oxide composite was prepared in an on-line solid-phase extraction disk and coupled to high-performance liquid chromatography for the re-enrichment of heterocyclic aromatic amines. The synthetic composite presented an excellent adsorption capability because of the ultrahigh active surface area of graphene and the abundant alkaline groups of arginine. The adsorption capacity of it was 52.7 mg 2-amino-3-methyl-imidazo[4,5-f]-quinoline per gram, nearly twice that of threonine-modified reduced graphene oxide composite, glutamic acid modified reduced graphene oxide composite, and reduced graphene oxide. This on-line method was successfully applied to the detection of a series of heterocyclic aromatic amines in beef jerky. After clean-up and re-enrichment of the on-line solid-phase extraction disk, the chromatographic background of the sample was low and the shape of chromatographic peaks was sharp. The method detection limit was in the range of 0.30-0.49 ng/g, and the recovery was in the range of 82.0-111.5%.
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